title: Fatigue in multiple sclerosis: is the picture getting simpler or more complex?
mesh_terms: D001923:Brain Chemistry; D002490:Central Nervous System / Q000503:physiopathology; D004574:Electromagnetic Fields; D005221:Fatigue / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D009103:Multiple Sclerosis / Q000150:complications* / Q000503:physiopathology